x86, mm: Allow ZONE_DMA to be configurable

[pandora-kernel.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8db4fbf..0eb801a 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -112,7 +112,14 @@ config MMU
        def_bool y
 
 config ZONE_DMA
-       def_bool y
+       bool "DMA memory allocation support" if EXPERT
+       default y
+       help
+         DMA memory allocation support allows devices with less than 32-bit
+         addressing to allocate within the first 16MB of address space.
+         Disable if no such devices will be used.
+
+         If unsure, say Y.
 
 config SBUS
        bool
@@ -1174,7 +1181,7 @@ comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
 config AMD_NUMA
        def_bool y
        prompt "Old style AMD Opteron NUMA detection"
-       depends on X86_64 && NUMA && PCI
+       depends on NUMA && PCI
        ---help---
          Enable AMD NUMA node topology detection.  You should say Y here if
          you have a multi processor AMD system. This uses an old method to
@@ -1201,7 +1208,7 @@ config NODES_SPAN_OTHER_NODES
 
 config NUMA_EMU
        bool "NUMA emulation"
-       depends on X86_64 && NUMA
+       depends on NUMA
        ---help---
          Enable NUMA emulation. A flat machine will be split
          into virtual nodes when booted with "numa=fake=N", where N is the